Bruce Tulloch wrote on di, 11 sep 2007:
I can confirm that this appears fixed, though still a little strange.
To explain...
Using FPC 2.3.1 SVN 8427 and GDB 6.6 and building with -gw/-gl we have:
(gdb) info source
Current source file is /home/bruce/vc/src//Widget.pas
Compilation directory is /home/bruce/vc/src/
Located in /home/bruce/vc/src/Widget.pas
Contains 637 lines.
Source language is pascal.
Compiled with unknown debugging format.
Does not include preprocessor macro info.
The difference appears to be that all references to directories are now
absolute, not relative and Emacs/GUD (at least) works happily with GDB.
The first strange thing to notice is that the current source file still
has a path prepended (as reported by GDB) if the source file is not in
the working directory (ie, the "/home/bruce/vc/src//" shown above).
That's normal, because of Dwarf's distinction between the "current
compilation directory" and "include directories relative to the
current compilation directory". Stabs has no such distinction, afaik.
The second strange thing is that gdb's "info source" reports
Source language is minimal.
Compiled with DWARF 2 debugging format.
Does not include preprocessor macro info.
when viewing source which is in the current working directory but:
Source language is pascal.
Compiled with unknown debugging format.
Does not include preprocessor macro info.
when viewing source which is located elsewhere. It seems gdb understands
that it's reading DWARF2 but not that the language is pascal if the file
is in the working directory and vice versa if the file is elsewhere.
gdb 6.6 ignores the Pascal language specifier in the Dwarf-2 info. I
don't know why it works when the file is in a different directory, as
it always ignores it. I've submitted a patch which has since then been
applied in gdb cvs.
You can work around it by using "set lang pascal".
So far these issues appear benign for our purposes here, but presumably
they indicate something is still amiss?
Another clue may be complaints by readelf -wl which reports:
"Warning: The line info appears to be corrupt - the section is too small"
I can reproduce this, I'll have a look.
Jonas
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